Gregerson was placed on the 15-day DL with a left oblique strain, Angel Verdejo Jr. of the Houston Chronicle reports.

EDGE Analysis

It's unclear exactly when Gregerson began feeling discomfort but he'll head to the DL now to recuperate. The Astros will miss his arm in the bullpen as he'd given up only one earned run over 10.1 innings in July (0.87 ERA). James Hoyt is expected to be recalled Wednesday in a corresponding roster move.